Enum FocusTarget 

#[repr(C, u8)]
pub enum FocusTarget {
    Id(DomNodeId),
    Path(FocusTargetPath),
    Previous,
    Next,
    First,
    Last,
    NoFocus,
    Directional(FocusDirection),
}

Defines the focus_targeted node ID for the next frame

Variants

Id(DomNodeId)

Path(FocusTargetPath)

Previous

Next

First

Last

NoFocus

Directional(FocusDirection)

Move focus in a SPATIAL direction rather than along the tab order. APPENDED at the end for ABI stability.

Tab order is a single sequence; a grid of thumbnails, a TV menu or a media-player transport row is two-dimensional, and pressing Right in one should land on the thing to the right, not on whatever happens to be next in document order.

This is not really a device feature — it is a focus-engine feature that a dozen devices drive: a TV remote’s D-pad, a game controller, a car’s jog dial, and switch access. Android models it as a first-class input source (SOURCE_DPAD) and the W3C specifies it in css-nav-1. It needs no shell code at all: the search is geometric, over the focusable set the engine already computes.

Trait Implementations

impl Clone for FocusTarget

fn clone(&self) -> FocusTarget

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for FocusTarget

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Eq for FocusTarget

impl Hash for FocusTarget

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Ord for FocusTarget

fn cmp(&self, other: &FocusTarget) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

fn clamp_to<R>(self, range: R) -> Self

where Self: Sized, R: ClampBounds<Self>,

🔬This is a nightly-only experimental API. (clamp_to)

Restrict a value to a certain range.

impl PartialEq for FocusTarget

fn eq(&self, other: &FocusTarget) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl PartialOrd for FocusTarget

fn partial_cmp(&self, other: &FocusTarget) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

fn lt(&self, other: &Rhs) -> bool

Tests less than (for self and other) and is used by the < operator.

fn le(&self, other: &Rhs) -> bool

Tests less than or equal to (for self and other) and is used by the <= operator.

fn gt(&self, other: &Rhs) -> bool

Tests greater than (for self and other) and is used by the > operator.

fn ge(&self, other: &Rhs) -> bool

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl StructuralPartialEq for FocusTarget